Carbureter.



UNITED srarr ns PATENT OFFICE FRANK s. PIERCE, or MINNEAPOLIS, KANSAS.

CARBURETER.

Specification of Letters Patent.

Patented Jan. 13, 1914.

Application and April 22, 1912. Serial No. $2,413.

The object of the invention isto provide a simply constructed and easily operated and regulated carbureter which does not rely on heat to vaporize the gasolene, and which thoroughly mixes and prepares the mixture before it goes to the engine cylinder. By thoroughly mixing the air and gasolene while cold and carrying it to the cylinder cold none of its expansion is lost by heat, and all the force f the mixture is obtained in the cylinder thereby developing much greaterpower from the same number of,

cubic inches of mixture than if it were first heated.

Another object is to provide a carburetor so constructed as to render it almost impossible to flood the cylinder, and which may be readily taken apart and assembled for cleaning and other purposes.

With these and other objects in view the invention comprises certain novel constructions, combinations and arrangements of parts, as will be hereinafter more fully described and claimed. y

In the accompanying drawings-Figure 1 represents a side elevation partly in section. Fig. 2 is aplan view of the float; Fig. 3 is a plan view of the throttle valve.

In the embodiment illustrated a cylindrical casing 1 is shown of any suitable or desired size and composed of any suitable material preferably brass. This casing is preferably threaded at its upper and lower ends to receive the top 2 and bottom 3. The top 2 is preferably cone-shaped and screwed on the upper end of the casing 1, the apex of said cone terminating in anupwardly extending pipe 4 provided with a throttle valve 5 which extends transverselyfacross said pipe and is preferably constructed of a partition 6 having a circular opening 7 therein and provided at its opposite sides with guides 8. A slide 9 is mounted to reciprocate in'said guides at the will of the operator and is provided at its inner end with a semi-circular recess 10 to provide for a clear passage in the pipe 1 at all times, no matter how small. It is thus obvious that by drawing out the slide 9 the opening in the pipe is enlarged while pushmg in the slide reduces the size of the opening. An apertured lug 11 extends laterally from the slide 9 and .is designed to be connegted with an operating element such as a ro The casing 1 is provided at diametrically opposite points onits inner face with longitudinally extending grooves 12 and 13 in which are slidably mounted a removable fan .frame 14. The upper cross bar 15 of. this frame has ascrew 16 threaded therethrough and held in adjusted position by a lock nut 17. The inner end of this screw 16 has a bearing 18 therein in the form of a socket in which the-upper end of the fan shaft works as will be described. The lower cross bar 19 of the frame 14 has also a cone-bearing 20 therein.

Mounted to revolve in the bearings 18 and 20 is a fan-shaft 21 the opposite ends of which are pointed to form needle bearings to permit the shaft to revolve with the least possible resistance. 1 A plurality of series of mixing blades 22 are mounted on the shaft 21 andeach seriei of these blades is preferably fixed to a hu 23 which is screwed on the shaft 21, said shaft being referably screw threaded throughout its l or fans are so connected with their hub's that they stand when ap lied at an angle to the shaft 21 with one si e edge turned upwardly and the other downwardly to provide for the turning of the shaft when a slight pres sure of air is exerted on said blades.

The. bottom 3 of the casing 1 has a feed chamber 25 depending therefrom and provided with an air inlet 26 controlled by an inwardly'swinging gate 27 which is designed to'be swung inward by the pressure of the air. An expansion spring 28 is attached at one end to the gate 27 and at its other endto a screw-threaded spindle 29 which passes ength. These mixing blades cess 32 therein to permit a passage of air g chamber25'. This float chan1ber-34 1Q screwed therethe stem above the float thereunder when closed. A pipe 38 connects the lower end of said feed chamber with a float chamber 34 and is provided with a valve 35 for controlling the supply of gasolene! fed through said pipe 33 to the feed A is preferably provided with a cap 36 on and having av screw-threaded aperture 36-; disposed centrally therein. An exteri- Orly threaded pipe 37 is 'adjustably secured in said threaded aperture 3'6 audits inner end is designed to form a bearing for a float spindle or stem 38. This pipe 37 is connected with. a gaso'lene supply tank, not shown, and is designed to admit gasolene to controlled by a' valve to be described.

- .fioat 39 composed of any suitable material, preferably cork coated with a solution of wood alcohol and shellac, is disposed in the chamber-34 and has a'centr'ally dispcsed brass-lined bore 40 through which the spindle gor', valve stem 38 passes loosely and which forms; a guide for thefloat This stem 38 has its upper endpoin'ted and ground verysmooth'and is fitted into the inner end of pipe37-forming a" needle valve for con- :trollin the-quantity of 'gasolene admitted through said'pipe. A stop. 41 is carried by 35 and is designed to limit its upward movement,'which when it engages {said stop on the rise of the gasolene in the chamber forces-the val've into the pipe end andcu't s'ofl'the admission of the gaso- 'lenel- A stop-.42 is also carried by the stem 38 below the float39 and is spaced from said float a slight distance and'when the float falls on the lowering of the liquid level in the. chamber. 34; it will engage the stop 42 thelfloat chamber 3 the admission being and force thestem down, thus opening the valve.- lVhen the float drops on the lowerof. the gasolene in the chamber'the stem [Jr-spindle also drops sufliciently-to open the valve and per-mit gasolene to flow into the chamber. By this meansthe gasolene is maintained at a certain level in the feed chamber 25. The screwing of the pipe 37 the air to be deflected down against the bot tom of the feed chamber 25, and thus draws with it in its passage to the casing 1, the

gasolene from said feed chamber; As the air is drawn into the casing 1 it impinges against the fans or blades 22 which causes them to revolve rapidly, owing to-their peculiarconstruction, and themounting of the shaft '21 on needle bearings, and the air-and gasolene is thus cominingled and vaporized. This mixture passes through the throttle valve into the cylinder of the engine where it is exploded and furnishes power.

I claim as my invention- The herein described carbureter comprising a flanged base of inverted cone shape having a centrally disposed inlet for the gases to be mixed, :1 flanged cone shaped top having athrottle valve at its upper discharge end, a cylindrical casing having its upper. and lower ends detachably engaged with the flanges of the top and base and formed on its i'nnen wall at diametrical opposite points with vertical grooves, a rectangular frame having its upright side bars slidably engaged with said grooves and its upper and lower bars provided with cone seats, one of the latter being adjustable, an upright threaded shaft having cone shaped ends to engage said cone bearings, 21 series of superimposed fans having. their hubs threaded on said shaft and clamping nuts on said shaft above and below the hubs to adjust ably secure the fans in position.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

' FRAXK s. PIERCE.

lVit-nesses:

MARTIX S; Bnxxizrr, CHARLES C. Dav s.

, copies 'of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

I Washington, D. C. 

